+ +## Program design +Like all ideas I have, I wrote some code to test this idea out. Above is a small sample of the interesting designs found in the [gimp]() binary. The goals for this script were to: + + - Accept any file of any type or size + - Allow the user to select the file dimensions + - Generate an image + - Write the data in a common image format + +If you would like to see how the code works, read "*check out the script*". + +## A note on data wrapping +By using a [generator](https://wiki.python.org/moin/Generators), and the [range function](https://docs.python.org/3/library/functions.html#func-range)'s 3rd argument, any list can be easily split into a 2d list at a set interval. + +```python +# Assuming l is a list of data, and n is an int that denotes the desired split location +for i in range(0, len(l), n): + yield l[i:i + n] +``` + +### Binaries have a habit of not being rectangular +Unlike photos, binaries are not generated from rectangular image sensors, but instead from compilers and assemblers (and sometimes hand-written binary). These do not generate perfect rectangles. Due to this, my script simply removes the last line from the image to "reshape" it. I may end up adding a small piece of code to pad the final line instead of stripping it in the future. + +## Other file types +I also looked at other file types. Binaries are very interesting because they follow very strict ordering rules. I was hoping that a `wav` file would do something similar, but that does not appear to be the case. This is the most interesting pattern I could find in a `wav` file: + +I present: "Parts of @GIMP_Official's binary, represented as a bitmap" pic.twitter.com/iLljdE4nlK
— Evan Pratten (@ewpratten) September 11, 2019
+ +Back to executable data, these are small segments of a `dll` file: + + + + + +## Check out the script +This script is hosted [on my GitHub account](https://github.com/Ewpratten/binmap) as a standalone file. Any version of python3 should work, but the following libraries are needed: + + - Pillow + - Numpy \ No newline at end of file diff --git a/_site/about/index.html b/_site/about/index.html index 0b4b2f1..d13407f 100644 --- a/_site/about/index.html +++ b/_site/about/index.html @@ -204,7 +204,7 @@ sub rsa4096/0xA61A2F1676E35144 2019-08-11 [] [expires: 2025-08-09] Site design by: Evan Pratten | - This site was last updated at: 2019-09-11 11:41:26 -0400 + This site was last updated at: 2019-09-11 17:12:28 -0400 @@ -283,6 +283,9 @@ sub rsa4096/0xA61A2F1676E35144 2019-08-11 [] [expires: 2025-08-09] }); + + +Following up my previous post with a tiny segment of an audio file. This one is little less interesting pic.twitter.com/u9EFloxnK5
— Evan Pratten (@ewpratten) September 11, 2019